You're right on except for this one statement:
"when was the last time you clicked through to a page that was nothing more than a legally copied, properly attributed Wikipedia entry encrusted in advertisements?"
On a growing number of search queries in Google, I'm seeing results from Ask.com that are Wikipedia articles with ads outranking the original Wikipedia posting.

Let's look at where stackoverflow.com traffic came from for the year of 2010. When 88.2% of all traffic for your website comes from a single source, criticizing that single source feels … risky. And perhaps a bit churlish, like looking a gift horse in the mouth, or saying something derogato...